Basically, all four sides of a square are equal. Perimeter is the distance around a shape. So if the perimeter is 20 cm, the length of one side would be 20/4 = 5.
If the sides are all doubled, they would each be 10cm instead of 5cm.
The perimeter of that would be 10 times 4 which equals 40.
So to fill out the five blanks:
1. Equal
2. 5 cm
3. Times two, I guess?
4. 10 cm
5. 40 cm
Hope this helps! Let me know if you’re unclear on anything :)
